Description
FiiO K9 AKM Balanced Desktop DAC and Amplifier
AKM flagship DAC combo: AK4191EQ+AK4499EX
The K9 AKM applies AKM’s brand-new flagship DAC combo –AK4191EQ+AK4499EX. Based on the new design technology of totally separated digital and analog sections, the DAC combo even incorporates the newly developed “DWA ROUTING technology” to improve the Signal to Noise Ratio and reduce noise from varieties of amplitude. The result is more realistic, detailed, and natural sound transmission, as if you were there with the performing artists.
High-end amplifier, Refreshingly capable
The FIIO K9 AKM’s ace up its sleeve is the THX AAA 788+ amplifier, giving it an extraordinary 1% undistorted power output up to 780mW at 3000 and up to 2000mW at 320. No matter if you use low-impedance or high-impedance headphones, the K9 AKM will drive it with aplomb.
Fully balanced design
Music to your ears
From the DAC, to the volume adjustment, to the amplification, every part of the K9 AKM is truly balanced for greatly reduced crosstalk and more authentic sound.
Partitioned design for max performance of each section
The PCB of the K9 AKM features a partitioned layout, fully separating the major sections of the audio circuit – the power supply, signals, and analog signal loop. This guarantees the integrity of the audio signal being processed.
Six-stage audio circuit, Faithfully reproducing sound
The desktop-grade six-stage audio circuit was meticulously designed to ensure a pure, delicate yet rich sound. I/V conversion, LPF filter, digital volume adjustment, buffer amplifier, pre-amplifier, post-stage drive.
Robust power supply, Ample power
Electricity is the mother of The linear transformer is paired with 4 massive 4700uF capacitors to provide clean continuous power.
Isolated digital and analog section power supply for purer sound
The digital and analog portions of the K9 AKM receive power separately to reduce interference between the two audio circuits, for pure and faithful reproduction of
your music.
Multiple LDOS in multiple stages, Truly stable power
The power stabilization and filtering within the audio circuit play a big part in ensuring excellent sound quality. Each stage of the audio circuit employs ultra-low-noise LDOS for voltage regulation.
Dual-mode clock management, Even more improvement to sound
Accurate and stable dual-mode clock management allows the K9 AKM to easily play back high-resolution audio with the greatest fidelity as if you were there with the performing artists.
* Supports up to 768kHz/32bit PCM and DSD512
High-res Bluetooth, Adept at all of your audiovisual needs
The K9 AKM employs the QCC5124 Bluetooth chip with support for LDAC/aptX HD/aptX Adaptive and other high-res Bluetooth codecs. With the K9 AKM, you can listen to music, watch videos, and play video games with high quality and low latency.
*Bluetooth 5.1, supported formats: LDAC/aptX Adaptive/aptX/aptX HD/aptX LL/AAC/SBC
Compatible with UAC1.0/UAC2.0, Highly adaptable
The K9 AKM supports both UAC1.0 and UAC2.0 modes, allowing you to use the K9 AKM with either devices that are simply plug-and-play or with devices that can work with the K9 AKM with an additional driver for even better compatibility. And the FIIO Control App allows you to easily switch between UAC1.0 and UAC2.0 modes. *UAC1.0 for PS5 and other device support
Neatly handsome, Horizontal or vertical
The K9 AKM adopts the well-received design language of other FIIO desktop units and features an all-aluminum construction made from an integrated stretching + CNC process to ensure the body’s strength and precise finish. With the vertical stand, the K9 AKM can be used either vertically or horizontally, allowing it to become a versatile part of your desktop setup.
A weighty feel, For a weighty sound
The iconic, weighty FIIO volume knob is powered by ADC curve reconstruction to allow you to precisely and smoothly adjust through 120 levels of volume, with minimal noise and volume deviation between the left and right channels.
Light it up, Let the high-res music commence
Not only do the RGB lights around the knobs give the K9 AKM and the desk space around it some fun personality, they also conveniently indicate the current audio sampling rate and Bluetooth codec.
Professional PEQ for what you love
Through the FIIO Control app, you can quickly switch between 7 music
tuning styles preset on the K9 AKM. If the selected tuning style fits the music you are listening to, you can acquire a more vivid and pleasant experience. If the preset tuning style is not to your liking, the 3 self-define PEQ (Parametric Equalizer) designs will help to adjust to your favorite listening style.
*This function is only valid for Bluetooth decoding.
To show off your skills, One app is enough
You can connect the K9 AKM to your phone via Bluetooth, and with the addition of the FIIO Control app, you get access to even more functionality. Adjust various settings such as 6 types of filters, status indicators, EQ, and channel balance to exactly your liking.
*EQ only works in Bluetooth mode.
Multiple intelligent protection systems, Always ready to go
Three intelligent protection systems – preventing overheating, overload, and DC protection – constantly make sure that the K9 AKM delivers high-energy music without wearing itself out.
IN THE BOX
- K9 AKM
- Headphone plug adapter
- USB data cable
- Stand
- Quick start guide
- Voltage selection card
- Power cord
- Fuse
SPECIFICATIONS
| General Specifications | |||
| Name/Model | K9 AKM | Hardware Scheme | DAC: AK4499EX+AK4191EQ, USB decoding: XUF208, Bluetooth: QCC5124, LPF: OPA1612*2, Volume IC: NJU72315*2, AMP: THX AAA788+*2, transformer: linear transformer |
| color | Black | Volume Control Type | Analog Potentiometer (ADC sampling) |
| Weight | Approximately 2660g | Channel Balance | L12 to R12 (0.5dB per stage) |
| gain | L/M/H | FiiO Control | support |
| Bluetooth format indication | support | Sample Rate Indication | support |
| Dimensions | 200x 224.5x 72mm (excluding foot pads) | Firmware Upgrade | System firmware upgrades through USB, Bluetooth firmware upgrades through FIIO Control |
| Deep Standby | Long press the multi-function key for about 3 seconds | Low Power Reminder | None |
| Bluetooth Transmitter | None | Bluetooth reception (5.1) | AAC/SBC/aptX/aptX LL/aptX HD/LDAC/atpX Adaptive |
| Bluetooth format indicator | SBC: blue, AAC: cyan, aptX HD: yellow, aptX: purple, aptX LL: purple, LDAC: white, atpX Adaptive: green | Adapted impedance | PO:8~150Ω |
| Maximum supported sampling rate | 768kHz-32bit/DSD512(USB DAC) | BAL:8~350Ω | |
| 192 kHz-24bit (coaxial) | |||
| 96 KHz-24bit (fiber) | |||
| Keys and Interfaces | |||
| key | Solid key + toggle switch | USB | USB B*1, Type-C*1 |
| Single-ended input interface | RCA Socket | Balancing Line Input Interface | 4.4mm balance socket |
| Digital Fiber Input Interface | optical fiber socket | Digital Coaxial Input Interface | RCA socket |
| Balancing output interface | 4.4mm socket, XLR4 balanced socket | Headphone output interface | standard 6.35mm socket |
| Balancing line output interface | XLR3 balance socket | Single-ended line output interface | RCA Socket |
| Power Parameters | |||
| power supply | AC 100-120V ~/AC 220-240V ~ (recommended) | Battery Capacity | None |
| Audio Parameters | |||
| Some performance parameters of single-ended line output | |||
| distortion plus noise | ＜0.00027% (1kHz/-0.7dB@10kΩ) | signal-to-noise ratio | ≥119dB (A-weighted) |
| channel separation | ≥112dB (1kHz@10kΩ) | bottom noise | ＜2.9μV (A-weighted) |
| frequency response | 20Hz~50kHz: damping＜-3.5dB | Line Output Level | 2.3Vrms (1kHz@10kΩ) |
| Performance Parameters of Balanced Line Output | |||
| distortion plus noise | ＜0.00020% (1kHz/-1dB@10kΩ) | signal-to-noise ratio | ≥128dB (A-weighted) |
| channel separation | ≥122dB (1kHz@10kΩ) | bottom noise | ＜1.9μV (A-weighted) |
| frequency response | 20Hz~50kHz: damping＜-3.5dB | Line Output Level | 4.7Vrms (1kHz@10kΩ) |
| Headset Output Part Performance Parameters (6.35mm) | |||
| Output power 1 | L+R≥1000mW+1000mW (16Ω, THD+N＜1%, AUX/UAC/SPDIF/BT IN) | output impedance | ＜1Ω (32Ω) |
| Output power 2 | L+R≥1500mW+1500mW (32Ω, THD+N＜1%, AUX/UAC/SPDIF/BT IN) | channel separation | ≥76dB (1kHz@32Ω) |
| Output power 3 | L+R≥200mW+200mW (300Ω, THD+N＜1%, AUX IN) | distortion plus noise | ＜0.00026% (1kHz/-1.3dB@32Ω) |
| bottom noise | ＜3.0μV (A-weighted) | signal-to-noise ratio | ≥127dB (A-weighted) |
| frequency response | 20Hz~50kHz: damping＜-3.5dB | peak output voltage | ＞21Vp-p |
| balanced headphone output part performance parameters (4.4mm/XLR4) | |||
| Output power 1 | L+R≥1000mW+1000mW (16Ω, THD+N＜1%, AUX/UAC/SPDIF/BT IN) | output impedance | ＜1Ω (32Ω) |
| Output power 2 | L+R≥2000mW+2000mW (32Ω, THD+N＜1%, AUX/UAC/SPDIF/BT IN) | channel separation | ≥116dB (1kHz@32Ω) |
| Output power 3 | L+R≥780mW+780mW (300Ω, THD+N＜1%, AUX IN) | distortion plus noise | ＜0.00029% (1kHz/-9.5dB@32Ω) |
| bottom noise | ＜5.2μV (A-weighted) | signal-to-noise ratio | ≥124dB (A-weighted) |
| frequency response | 20Hz~50kHz: damping＜-3.5dB | peak output voltage | ＞42Vp-p |
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